Hatch-door



(No Model.) 2 Sheets-Sheet 1.

J. J. .McBRIDE.

HATCH DOOR.

Patented an. 19, 1892.

1 rxzu Lt sias 2 Sheets-Sheet 2,

(NoModeL) J. J. MCBRIDE "HAT-0H DOOR,

Patented Jan. 19, 1892.

wfi a Q @ZM 6M Wi NITED STATES ATENT FFIGE.

JOHN JAMES MCBRIDE, OF RIDGEFIELD PARK, NEIV JERSEY, ASSIGNOR TO HENRY I. COE, OF ST. LOUIS, MISSOURI.

HATCH-DOOR.

SPECIFICATION forming part of Letters Patent No. 467,185, dated January 19, 1892.

Application filed December 9, 1890. Serial No- 374,099. (No model.)

To all whom, it may concern: pass through the holes 13 in the housings 7 Be it known that I, JOHN JAMES MCBRIDE, and cause the studs 14 on bolts to, enter the a citizen of the United States, residing at groove 11. Ridgefield Park, in the county of Bergen and In the drawings the doors are all shown 5 State of New Jersey, have invented certain as beneath the cab, and the keys are on the new and useful Improvements in Hatchlower side of the cab only. As the cab del )oors, of which the following is a specificascends and approaches the first door 3 its U011 four keys will enter the four holes 13 of the My invention relates to the class of doors locks, and the bolts will be retracted by the op- 10 for covering hatchways commonly called careration of the curved grooves 12 and studs lat, y so as to release the door from its support on the I will first describe my invention with refsockets 4. As the cab continues to descend, to erence to the accompanying drawings, reservthe roller 6 will travel with little friction ing for the claims a citation of the novel comover the guide-posts, which accordingly coact I 5 bination. with the curve of the key-groove and the In said drawings, Figure I is a sectional Stud. 14 in preventing the fall of the door. elevation of an elevator-shaft having my im- The latter hangs on the cab, and when the proved doors. Fig. II is a detail perspective cab in its descent reaches the next door the view of a door-lock. Fig. III isa similar first is raised somewhat by the impact. The

2c View, partly broken away, of a key. large portion of the groove 11 is made of 1 may represent the side 'or corner posts of length proportionate to the total thickness of an elevator, and 2 the cab or platform. the doors to be at any one time hung upon 3 3 3 3 are doors, in number corresponding the keys. to the number of floors of the building and The carrying-doors are put in at equal dis- 2 5 of size to close the hatch-opening. tances apart, so as to even up the distance at 4 are sockets mounted in any fixture at between floors; but when the floors are at the floor-level. They are preferably four in uneven distances apart the manufacturers 7 number, one for each corner of the door. sometimes have to cornice down, or, in other 5 5 are bolts, whose locking ends are prefwords, put a cornice around the hatch-open- 3o erably provided with anti-friction rollers 6, ing. Such cornicing leaves pits below the adapted to lock in the said sockets. The floor-surface. My invention does away with housings '7 for said bolts are arranged on the this cornicing, as each door is dropped at its four corners of the door. Compressionfloor, and it makes not any difference how springs 8 within the housings surrounding far the different floors are apart.

35 the bolt, between the housing end and flange Having thus described my invention, the a 9 on the bolt, keep the bolt' normally profollowing is what I claim as new therein and jected. These springs are not necessarily of desire to secure by Letters Patent: great strength. They are only intended to 1. The combination of a cab or'platforin, keep the bolt in its socket, the bolts being the key on the cab or platform having straight 4o projected and withdrawn positively. sides, and a longitudinal groove formed with 10 10 are keys, the shape of which is shown outer and inner ends parallel with the sides in Fig. III. These are four in number and and connected by a curved portion, and a are fixed to the cab or platform so as to prohatch-door having a housing formed wit-ha ject toward the doors. Each key has straight key-hole, and the bolt having a stud and 45 sides and a groove 11., having its outer and sliding in the housing, substantially as deinner ends parallel with its sides, but curved scribed. intermediately near the lower end of the key, 2. The combination of the guide-posts 1, as shown at 12. The keys are adapted to having sockets 4, the doors 3, housings 7,

spring bolts 5, having studs ll, and cab 2, having unlocking and door-supporting keys having keys 10, grooved at 11 12, snbstanprovided with curved grooves, suhstnntlally tially as set forth. as set forth.

3. The combination of the guide-posts, the JOHN JAMES MCBRIDE. 5 doors, bolts therein having anti friction Witnesses:

wheels 6 and provided with draw-studs, the HARRY E. KNIGHT,

housings 7,1mving the holes 13, and a cab l HENRY I. COE. 

